Plaster base or insulating material



June Z9, 193

E. D. CODDINGTON PLASTER BASE OR INSULATING MATERIAL Filed July 2, 1956my Maa/,6m

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l the sheet.

Patented June 29, 1937 PATENT OFFICE gPLAsTER BASE on INSULATINGMATERIAL Edwin D. ooaaingtun, Douglaston, N. Y., assignm- 2 to ReynoldsCorporation, New York, 'Ny Y., a l @corporation of Delaware` l`Application July 2, 1936, Serial No. 88,662

1 Claim.

This invention relates to plaster bases employed in buildingconstruction. More particularly the invention is directed to that typeof plaster base comprising a sheet of flexible material bent back andforth to provide a series of folds or undulations and having straight,parallel stiffening wires or rods intersecting the hills and bridgingthe valleys of the undulations so as to form an anchorage for plasticmaterial which is designed to be applied to one side of Such a type ofplaster base is described in my patent No. 1,750,877, dated March l 18,1930, upon which the present invention represents an improvement.

In the plaster base disclosed in said patent,

a plurality of sheet metal or wooden stays are disposed within thebottoms of certain `of the folds so as to preserve them against collapseand also 4to stiften the sheet in a direction transverse- 20ly of thereinforcing wires.

An important object of the invention is to provide a plaster base of theabove character in which the stiffening stays are extended beyond onemarginal edge of the sheet so as to overlie 25 an adjacent sheet, andpreferably being so ar-` ranged as to intert with the stays of thelatter sheet.

Other objects and advantages will become apparent from the followingdetailed description of 30 a preferred embodiment of the invention,references being had to the accompanying drawing in which:

Figure 1 is a facevew of a sheet of plaster base;

Figure 2 is a perspective view of a joint between two adjacent sheets ofplaster base showing the manner in which the sheets are adapted to beassembled in a wall construction; and

Figure 3 is a cross-sectional view on the line 40.3--3 of Fig. 2 throughthe overlapped ends of a I tlnuous series of regularly-spaced folds orundulations 2 extending in a horizontal direction between the edges ofthe sheet. Intersecting the l `hills and bridging the valleys of theundulations u 55 at right angles theretois a series of straight,

(Cl. l2-116) spaced, parallel metal wires or rods 3 which extendcrosswise of the sheet.

These wires reinforce the sheet in a Vertical direction andl in order tostiften the sheet in a horizontal direction a plurality of light, sheetImetal stays 4 of generally U-shaped cross-section are disposed withinalternate valleys uponl the plaster-receiving side of the sheet andbeneath the Wires 3. These stiifening stays extend from a position flushwith one margin la of the sheet to a position beyondits opposite marginlb so as to overlap an adjoining sheet. The upstanding flanges of theU-shaped stays are Welded or otherwise rigidly secured to the overlyingwires 3. For imparting a better heatinsulating effect, the surfaces ofthe sheets which face the dead air space within the hollow walls orpartitions of a building (that is, the sides of the sheets oppositethose which receive the plaster coating) are covered by a bright,

f heat-reflective material 5, such as aluminum foil.

The wires 3 terminate even With one edge Ic of the sheet and areextended a substantial distance beyond its opposite side Id, as bestindicated in Fig. 1. The purpose of this is to obtain sufcient overlapof the wires with respect to adjoining sheets of the plaster base toavoid cracking of the plaster adjacent the edges of these sheets.

As best indicated in Fig.` 2, the association of the sheets of plasterbase with the studding is such that two laterally adjacent sheets A andB are arranged in horizontally staggered relation with respect to asheet C immediately above them so that the extended portions of thereinforcing wires of the lower sheets bridges the overlap with the uppersheet. These extended ends of the reinforcing wires are terminallydirected downwardly toward the plane (i. e., the extended surface) ofthe sheet, as indicated' in Fig. 2, so as to resiliently engage theadjacent sheet andV to reduce the gap between the wires and the sheet.The vertical side edges of two adjoining sheets are disposed in abuttingrelation with the projecting portions of the V-shaped stays nestingwithin the bottoms of corresponding stays of the adjacent sheet. Thesheets are alixed to the supporting studding S by nails or tacks 6passing through the bottoms of the nested stays and backing sheet intothe studs. Plaster is applied to the outer faces `of the sheets in thecustomary manner.

i `As will be apparent, the projecting ends of the .metal stays servenot only to facilitate aligning the sheets of plaster base horizontallyin their the contiguous sheet by reason of stresses im parted to theWall intermediate the studs, and

thereby produce or promote cracking in this locality. Y

Manifestly the invention may be'embodied in other forms than that.describedrabova which latter is to be considered simply asillustrative.

I claim: Y

A reinforced plaster-supporting fabric comprising a sheet of exiblefibrous material bent back and forth to provide a series ofregularlyspaced undulations, a plurality of reinforcing Wires passingtransversely through the undulations, said Wires terminating even withone of the edges of the sheet and being extended beyond the oppositeedge of the sheet and lthe ends of said wires being bent toward the'surface of the'sheet, and a plurality oi sheetmetal stays oftrough-shaped cross-section seated within the bottom of certain of theundulations and having their Vside Walls vrigidly aiixed to thereinforcing Wires, said stays terminating even with one edge of thesheet and projecting beyond the opposite edge of the sheet.

' Y EDWIN D. CODDINGTON.

